On Wed, 29 Jul 2015, Vincent Slyngstad wrote:

From: Pete Turnbull: Wednesday, July 29, 2015 2:57 AM
On 29/07/2015 07:24, Vincent Slyngstad wrote:
I've placed a new design at:
http://svn.so-much-stuff.com/svn/trunk/3D/rack-bracket/bracket-new.jpg

That looks pretty good to me, and the only refinements I'd suggest are these:

Firstly, to add a small fillet to the junction of post and flat surface, so that there's a small radius, perhaps 0.5mm - 1.0mm, at the transition. The sharp transition will concentrate any stress, and a radius will reduce that. I'm not sure how much difference it makes for a 3D-printed object but it would be significant for injection moulding.

Are you referring to the junction of the post and the block? That would be easy enough to do (though tedious in SketchUp).

...which is why SketchUp shouldn't be used for CAD work. If you're using Windows, I strongly suggest you get DesignSpark Mechanical - it's free to use and has a work flow very similar to SketchUp. If you're not using Windows, give the current release of FreeCAD a shot.

When it comes to CAD work, SketchUp is THE worst choice possible.

You should also do your design work in metric if you expect to be having parts printed. Scaling isn't a practical solution because it can introduce problems depending on the slicer used.

g.

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